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Finding the Fourth Proportional to 18,486.21, 27,729.32 and 4,635.21

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Solution

The fourth proportional to 18,486.21, 27,729.32 and 4,635.21 is: 6,952.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,486.21 : 27,729.32 = 4,635.21 : x
  2. Step 2: Convert to fraction form
    18,486.21/27,729.32 = 4,635.21/x
  3. Step 3: Cross multiply
    18,486.21x = 27,729.32 × 4,635.21
  4. Step 4: Simplify right side
    18,486.21x = 128,531,198.18
  5. Step 5: Solve for x
    x = 128,531,198.18/18,486.21
  6. Step 6: Final answer
    x = 6,952.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.